Truck spring suspension



Nov. 10, 1931. R. HUBBARD TRUCK SPRING SUSPENSION Filed May 25. 1931Patented Nov. 10, 1931 ROWLAND HURBARD, or RHLADELPHIA,

BRILLCOMPANY, OF PHILADELPHIA, PENNSYLVANIA,

sYLvANniV applicati@ nlednay 2s,

The object of this inventiony is .to improve the construction of springsuspensions forear trucks. The invention is particularly adapted for usein connection with the trucks of suburban and trolley cars.

In the accompanying drawings:

Fig. 1 is sectional view on the line 1 1, Fig. 2, showing one-half Ofthebolster and frame of the car truck, illustrating my 1nvention;

F ig. 2 is a section on the line 2`2, Fig. 1, showing an end view of thebolster and spring;

Fig. 3 is a sectional plan view on the l1ne 3MB, Fig. 2;

Fig. 4 is a detached perspective view of the end of the bolster;

Fig. 5 is an end view of the spring block; and

F ig. 6 is a view similar to Fig. 1, illustrating a modification of theinvention.

1 is one of the side frames of the car truck. 22 are the transoms whichextend from one side of the frame of the truck to the other,

i and between which is the bolster 3. This bolster is in the form of ahollow box having side channel members 4, a top plate 5, and a bottomplate 6. The top and bottom plates are secured to the side members 4 4by rivplates 7, as clearly shown in Fig. 3. Suspended from the links 8is a spring block 10. A connecting pin 11 extends through the springblock 1() and through the lower ends of the links 8, Figs. 1 and 2.Mounted on the l spring block are two semielliptical springs 12-12,which are spaced apart a certain distance, and extending from the bottomplate 6 of the bolster is a web 13, which in the present instance issecured to the plate by welding.

'- The springs 12 are firmly attached to the spring plate by U-shapedbolts 14, which extend over the springs and extend through the block 10,and on the lower ends of the U- shaped bolts are nuts 15. The springblock in the present instance is made hollow and con- PENNSYLVANIA,AssIGNoR 'ro Trina.` lG..

TRUCK SPRING susrRNsroN y 19.31." serial No. saasos.

sists of a lower channel' member 16 and atop platel, which is welded tothe upturned flanges of the channel. The construction of this springblock maybe modiied without departing from the essential features of theinventio The inner end of each spring 12 is hung from the bolster 3 bylinks 18, pivoted to the bolster at 19, and extending-through the eye ofeach spring is a pin 20. The links 18 are preferably made U-shape andextend under the inner ends of the springs, so that in the event of thebreaking of the pin20, the spring would, be held bythe connectingportion of the links. The outer ends of the springs12haveeyesthroughwhich extends a pin 21. Thezpin also of the Vbolster 3.In the present instance this extension consists of a portion ofthe'bottom plate 6 oi the bolster and two angle plates 23--23l Theseextensions of the bolster project under the main frame 3 and beyond theframe, allowing the use of long springs. The outer ends of the angleplates 23 arey riveted to the extension of the bottom plate 6 and theirinner ends are secured by rivets which pass through the plate 6l and thelower flanges of the channel members 4 of the bolster 3. Thisconstruction is very substantial and firmly supports the outer ends ofthesprings. As the outer end of each spring is pivoted at a ixed point,the links 8 have movement when the truck is in motion, while the, links18 have movement onlywhen the; springs of the truck are in motio s l Atthe center of the bolster 3 is a center pin bearing 28, whichinay be ofthe Ordinary construction, and near each outer end of the bolster 3 is abox-like extension 24, which carries the side bearing plates 25. lThebolster has rub plates 26 at each side, which are located closeto theangle plates 27, secured to the tra-nsoms 2, and bearing rub plates 29limiting the lateral movement of the bolster.-

Fig. 6 illustrates a modification of the invention, in which the 'innerends of the springs 12a are secured by a pin 21a to a bracket Ontheunderside of the bolster 3a. The outeraend of each spring is suspendedVfrom the bolster by links .18ct.v The construc- A CORPORATION O F PENN-i passes -through an extension 22 tion shown in Fig. 1,however, is theone preferred, as long springs can be used.

VlVhile I have illustrated a heavy duty truck having a pair ofsemi-elliptical springs at each side, it will be understood that inlight tracks a single spring at each side may be used without departingfrom the essential features of the invention. Y

l claim:

l. The combination in a car truck, of transoms; a bolster locatedbetween the transonis; spring block; links suspending the block from thetransoms; a semi-elliptical spring located on the block under thebolster, one end of the spring being pivoted directly the bolster; andlinks hung from the bolster and connected to the oppositeend of thespring,- so thatthe spring will have a rigidconnection with the bolsterat one end and will be free to accommodate itself to the movement of thetruck through the medium of the links. v

Q. The combination in a car truck, of side frames; transoins connectingthe side frames, said transoms being spaced apart; a bolster locatedbetween the transoms; aspring block; links connecting the spring blockwith the transoms; a semi-elliptical spring mounted on the spring block,said spring being directly connected to the bolster at its outer end;and links connecting the inner end of the spring with the bolstersothatthe spring is free to move on the outer connection as apivot. y

3. The combination in a car truck, of side frames; transoms connectingthe side frames, said transoms being spaced apart; a bolster locatedbetween the transoms a spring blocl. links connecting the spring blockwith the transoms; two semi-elliptical springs arranged side-by-side andcarried by the spring block; a pivot pin mounted on the outerend of thebolster' and to which the outer ends of the springs are pivotallyconnected; and links pivotally suspended from the bolster and pivotallyconnected to the inner ends ol' the springs, so that the springs arefree to move on the pivot pin at the outer end of the bolster.

4. rl`he combination in a car truck, of side trames; transoms extendingfrom one side frame to the other, said transoms being spaced apart; abolster located between the transoms, the bolster having extensions ateach end projecting under the side frames; a spring block; linksconnecting the spring lock with the transoms, the outer ends of thesprings at each side of the truck being pivotally connected directly tothe extensions of the bolster; and links connecting the inner end ofeach spring Vat each side of the truck with the bolster, so that thelinks supporting the spring block and the links supporting the innerends of the springs will be allowed t0 move to accommodate the movementof the parts when the truck is in motion.

5. The combination in a car truck, of side frames; transoms connectingthe side frames, said transoms being spaced apart; a bolster mountedbetween the transoms, said bolster having extensions at each endprojecting under the side frames, said extensions consisting of a topplate and two angular side plates; a pivot pin extending from oneangular side plate to the other; a spring block-at each side of thetruck; links pivotally mounted on the transoms and pivotally attached tothe blocks; a pair of semi-elliptical springs mounted on each springblock, the springs of each pair being arranged comparatively closetogether and the outer ends of said springs being mounted onthe pivotpin on the extensions ot the bolster; and links connecting the innerends of the springs with the bolster, so that the springs are free topivot on the pivot pins when the truck is in motion.

ROWLAND HUBBARD.

